Morphological and quantitative data of plastids and mitochondria within drought-stressed spinach leaves

Protoplasma
Günther ZellnigAndreas Perktold

Abstract

Selected cell organelles were investigated at a high level of resolution with the transmission electron microscope, using ultrathin serial sections to create three-dimensional reconstructions. On the basis of these reconstructions, morphological data of chloroplast fine structures, mitochondria, and peroxisomes from control and drought-stressed spinach leaves were evaluated and compared. Mesophyll cell chloroplasts of control plants contained 60% stroma, 23% thylakoids, and 16% starch. In drought-stressed plants, the volume of both the stroma and the thylakoids increased to 68% and 32%, respectively. The amount of plastoglobuli was about 0.3% in both samples. Chloroplasts of stressed plants differed from control plants not only in the thylakoid and stroma values but also in the lack of starch grains. Mitochondria occurred in variable forms in control and stressed samples. In stressed plants, mitochondria had only 65% of the volume compared with control plants. Peroxisomes were inconspicuous.

Citations

Mar 26, 2009·Journal of Plant Research·Valya VassilevaUrs Feller
Oct 29, 2013·Photosynthesis Research·Taras K AntalEsa Tyystjärvi
Feb 17, 2009·Proceedings of the National Academy of Sciences of the United States of America·Yoselin Benitez-AlfonsoDavid Jackson
Nov 10, 2013·Journal of Experimental Botany·Thierry JoëtStéphane Dussert
Apr 11, 2007·FEMS Yeast Research·Andreas PerktoldGünther Zellnig
Dec 29, 2019·The New Phytologist·Guillaume Théroux-RancourtDanny Tholen

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